Don’t waste your money on the Apex UltraMax…or for that matter, with InnoVapor!!! I purchased two UltraMax e-cigs from InnoVapor less than a year ago and the performance was okay at best, but after spending $428.78 I’m left with two worthless e-cig mod’s and have moved on to the ProVari. The fist UltraMax lasted less than 10 months before ending up in the trash because the failure of the unit was somehow NOT covered by the 10-year warranty...The nickel plated finish had completely worn off and I could no longer unscrew the cap to the RES because of a broken ceramic disk (inside the RES). And when the ceramic disk in my other UltraMax broke last week (for the second time), I was told by InnoVapor to send it back (at my expense) and if there was so much as a scratch on it, it will most likely NOT be covered by Apex (the manufacturer). InnoVapor stated that this was out of their hands and was up to Apex, and they would have to abide by the findings of the manufacturer. If you are considering buying the UltraMax with the RES, check out this forum (and others) to see just how extensive the problem is with the ceramic disk breaking. In InnoVapor's own words: "We will be the first to come out an tell you that the ceramic is very fragile and you have to be very careful with it. I mean it is a piece of ceramic, not steel." I just wish they had told me that before I purchased my two UltraMax starter kits. Bottom line...Do yourself a favor and find a better e-cig mod to buy, and a better company to do business with.